Which term is represented by the root "Carcin/o"?

The root "Carcin/o" specifically refers to "cancerous." This root comes from the Greek word "karkinos," which means crab, a term historically used to describe tumors due to the crab-like spread of malignancies in the body. When medical terminology uses the prefix or root "carcin/o," it indicates a relationship to cancer, such as in words like "carcinoma," which refers to a type of cancer that begins in the skin or in tissues that line or cover internal organs.

The other options relate to different medical terms: "cell" is a fundamental unit of life and would be denoted with a different root; "cerebrum" pertains to a specific part of the brain, while "teeth" would relate to dental terminology. None of these options share the cancer-related meaning associated with "carcin/o," making the choice of "cancerous" the most appropriate understanding of this root.